Yes, I have verified it under Windows, there's a problem with a non-official sun.management.* package that is used to obtain informations about the OS and the CPU usage. The class is packed in the JDK6 but it is considered as a support class, outside of the official classes, which are all contained under java.* package.

The bad news is that in JDK7 those unofficial classe have finally been moved under the official package tree --> java.lang.management.*, thus creating an incompatibility with previous JDKs.My only suggestion for the moment is to stick with JDK6, we will fix this in a later release.